Using live cultures has risks of unknown contaminants. The speaker has highlighted the viability of the spores. What if some unknown spores get into cultures and we get into new problems.This happened with some vaccines made of biological like chick embryos. Already small labs have made probiotics a cottage industry.

I would like to add that there is an interbacterial interaction.Where some beneficial bacteria antagonize each other and inhibit both other beneficial and pathogenic bacteria where each species had a limited number in the microbiome balance.Gencoe incTechnical Dep.